Flight number record

UA 2455

United Airlines · Newark to Denver

Route: EWR → DEN
Departs: 10:00
Flights: 265
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2455, check with United Airlines.

UA 2455 lands a B+, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 265 flights, with a median arrival 10 minutes early.

Set against the rest of the country, UA 2455's record is 6 points better than the US average of 77.3%. That gap is worth roughly 60 fewer late arrivals for every thousand flights.

On time

83.3%

Arrivals under 15 minutes late, of 264 completed flights

Avg delay

63 min

Across delayed arrivals only, not all flights

Cancelled

0.38%

National rate is 1.89%

1 hour+ late

4.5%

National rate is 8.3%

These figures cover 265 flights between September 2025 and August 2026. The median arrival is 10 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

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Schedule

When UA 2455 flies

UA 2455 flies EWR to DEN without a single fixed slot. Its most common scheduled departure was 10:00, used on 105 of 265 flights, with 09:35 (67 flights) and 09:30 (53 flights) next.

Departs 10:00105 flights39.6%
Departs 09:3567 flights25.3%
Departs 09:3053 flights20.0%

Scale runs 0% to 100%.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 10:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and UA 2455 runs level with that at 83.3%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

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Against the route

UA 2455 next to EWR to DEN

Every carrier on EWR to DEN combined arrived on time 77.6% of the time across 3,349 flights, so UA 2455 is 6 points ahead of it. Across its whole network United Airlines managed 78.8%, which this flight beats by 5 points.

UA 2455 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 2455thin sample	265	83.3%	63 min	0.38%	B+
All United Airlines on EWR–DEN	3,349	77.6%	84 min	1.46%	B
All carriers on EWR–DEN	3,349	77.6%	84 min	1.46%	B
United Airlines, whole network	830,825	78.8%	73 min	1.02%	B

Across the year

UA 2455 quarter by quarter

UA 2455 did not run the same all year. Its best quarter was Apr–Jun 2026 at 93.4% on time and its weakest Oct–Dec 2025 at 68.7%, a swing of 25 points on roughly 66 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Oct–Dec 202567 flights68.7%
Jan–Mar 202645 flights75.0%
Apr–Jun 202691 flights93.4%
Jul–Sep 202662 flights90.3%

Scale runs 60% to 100%.

By weekday, UA 2455 ranged from 81.1% on Saturday to 89.5% on Wednesday. With about 38 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.

Arrival by arrival

How late UA 2455 runs when it is late

UA 2455 often beats the schedule: 103 of 264 completed flights, 39%, arrived 15 minutes or more early. The 44 late arrivals split 15 under half an hour, 17 between 30 and 60 minutes, and 12 an hour or more.

15+ min early103 flights39.0%
Within 15 min117 flights44.3%
15–29 min late15 flights5.7%
30–59 min late17 flights6.4%
1–2 hours late7 flights2.7%
2+ hours late5 flights1.9%

Scale runs 0% to 100%.

Share of 264 completed flights by arrival against schedule.

A late pushback is often recovered here: of 49 departures that left 15 minutes late or more, 16 still arrived on time. 11 flights left on time and still arrived late.

The worst days

Worst days for UA 2455

The latest arrival of the period was on 18 July 2026, 7 hours 58 minutes behind schedule; most of its delay minutes were filed as extreme weather. On three of the five worst days the largest share was filed as a late-arriving aircraft.

The latest arrivals of UA 2455 in the period
Date	Arrived late by	Largest filed cause
18 July 2026	7 hours 58 minutes	Extreme weather
3 January 2026	3 hours 58 minutes	Late-arriving aircraft
28 August 2026	2 hours 54 minutes	Late-arriving aircraft
14 December 2025	2 hours 47 minutes	Extreme weather
19 July 2026	2 hours 19 minutes	Late-arriving aircraft

Delay causes

Why UA 2455 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 2,789 reported delay minutes.

Carrier
31%
Late-arriving aircraft
23%
National Airspace System
23%
Extreme weather
23%

Extreme weather accounts for 23% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 3.8 times the usual weather exposure. The split is drawn from 2,789 delay minutes reported on UA 2455.

Cancellations are rare at 0.38%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 4.5% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

At 1,605 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.

The same number turns up on eight other city pairs in the data, including DEN to PDX (103), RSW to EWR (47) and ORD to SAV (30), but none flew often enough under UA 2455 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to EWR to DEN only.

One caution: this is a thin sample. 265 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

What to do with this

Booking UA 2455

For a booking, read UA 2455 as 83.3% on time with 0.38% cancelled over 265 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

A flight number here means United Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures